Hydraulic clutch transmission



lApril 22,1930. H. 1 1. KLINE 1,755,182'

HYDRAULIC CLUTCH TRANSMISSION Filed Aug. 14, 1928 5 Sheets-Sheet l @woe/14160@ i Hap/non JKc'ne ailier/ncaa' April v22, 1930. H. '.J. KLINE HYDRAULIC CLUTCH TRANSMISSION Filed A ug. x14, 1928 5. sheets-sheet 2v April 22, '1930. J. KUNE I 1,755,182v

HYDRAULIC CLUTCH, TRANSMISSION Filed Aug. 14, 192s v5 sheetssheet 5 l www) Apri! :22, 1930. vH. J. KLINE l C 1,755,182

HYDRAULIC CLUTCH TRANSMISSION 4Patente pr. 22, 1930 assisi .HARMON JKLINE, or DETROIT, MICIGAN HYDRAULIC CLUTCH TRANSMISSION Application fue@ August '14, 192s,- s'eriluo. 299,461.'

The present invention 'relates to improvements .in hydraulic clutch transmissions2 one vobject of the invention being the provision of a transmission of this type adapted to be interposed between a driving prime mover, such as an automobile engine, and the driven mechanism thereofV such -as the drive shaft and rear transmission and embodying means in which a liquid is employed as the transmitting medium between the driving elementand the driven element, there being provided a novel arrangement for controlling the flow of V liquid to regulate the transmission effect between the driving and driven element or the' reversal in the direction of rotation of the driven element.

. Another object of the invention is the prio-z vision of-a hydraulic clutch transmission in which Athe liquid is adapted to be fed by gravity and suction to the rot'or, the Iexhaust or intake of which is controlled' manually byI a valve vso that the transmission effect of the liquid between the rotor and the casing thereof may be varied so that various speeds inay be i delivered from the driving to the driven lelement-in a smooth and-steady manner without necessity of employing gearing as in the presenttype of gear transmission.

' Still another' object ofh the present inveiif tion is'- the provision of a hydraulic clutch .transmission of simple, practical and durable construction and one which can lbe readily interposed between the automobile engine and the'drive shaft to dispense with the present clutch and gear transmission and to provide a means whereby various forward speeds may be obtained in a steady gradual manner and a single reverse speed -may be obtained.

Wit-h the foregoing and other objects-"in View, which` will appear as -the description proceeds, the-invention resides in the combi-I nation and arrangements of parts and in the details of construction hereinafter described and claimed', it` being understood that changes in the` precise yembodiment of the invention herein disclosed can be made within the `scope of the claims without' departingfrom the i spirit of the invention.

through the complete transmission; V g Fig. 2 isa transverse. sectionalv view on the line Qf-Q of Fig.4 1` of one-half of the pres-v ent transmission;

Fig. 3 is a section taken on the line 3-3 of 55 Figl; l,

Fig. 4 is a section taken on vthe line 4-4 of Fig. 3; y

Fig.' 5 is a det-ail plan view of the gearing between the driving and driven elements Fig. `6 is an enlarged detail sectional view throgigh the rotor casing 'and one portion of the cylindrical valve; Y p

' Fig. 7 is an enlargedsectional view showing the roller bearing mountings for the rotor," shafts; i

Figs. Sand 9 are detail sectional views of` two'lniodifed forms of internal gearing carried by the driven element;

Fig. 10 is a longitudinal sectional View through a modiedform of transmission;

Fig. 11 is a section taken on the line 11-11 of Fig.'10; and I Fig. 12 is a section taken on the line 12- f12 of Fig.,10.v y Referring to the drawings and more particularly to Figs. 1 through 9, thenumeral 14 represents a main casing which is a fixed stat'ionary casing and is provided with the liange 15 for the .attachment thereto of theforward end 16 of the.casing. Mountedin -the casing, whichrwill later appear, is a driving shaft 17 which is provided with a coupling 18 for connection with the prime mover (not shown) preferably the engine of an automobile or motor car. The ball bearing 19' is mounted to anti-frictionally support the shaft in the portion 16 of theinaincasing and in the recess 20 while the driven shaft 21 is journalled in 'therear Vendof the casing 14 and has at- 9 tached thereto the sleeve 22 which is mountprove properly etiieient.

ed in the two sets of anti-frictional bearings 23 supported in the sleeve24 of the casing 14. The sleeve 22 is provided.with thedisk-25 which is rotatable therewith and as shown inl Fig. 1 is provided with the rim 26 carrying the internal gear teeth 27' the purpose o f which will presently appear.

vThe rotor casing 28 is mounted 'to''rot-ate upon and with the shaft 17 and is provided with the brake drum or rim 29 the removable end 30 being attached. by means of the bolts 31 so as to provide the rotor'chamber'36'. At-I tached to the shaft 17 by means of the key 32 and Within the rotor-casing is themain or center rotor 33 which in turn meshes with the cooperating rotors 34'and 34 keyed to andr mounted upon the respective shafts 35 and The rotors are formed, as shown in Fig. 2, with the intermeshing recesses c and teeth al 'and the smaller recesses e and teeth f, this particular construction being of the type known as the rotor of the Northern rotary pump, but may be of any desired shape that will eectively operate in the present transmission, it being the purpose of the present invention to utilize any type of rotor that will In order to drive the respective rotors, the gear 38 is'lreyed upon the shaft 17 exteriorlyof the rotor casing 28 and drives the gears 37 and 37 cast with or keyed respectively to the shafts 35 and 35. By^this means the. rotation of the shaft 17 through the gear 38 will rotate thetwo gears 37 and 37 and consequenly the two shafts 35 Aand 35 so that the rotors 34 and 34 'will' be operated in proper time relation.

Keyed to the respective shafts 35'and 35 are' 4 cally opposite point-s with the gear 27 ofthe driving disk 25 thus providing means whereby the driven shaft 21 is rotated and in proper speed relation due to the speed of rotation of the rotor casing-28 driven through the rotors and the liquid as will presently appear under certain conditions, the gears 39 and 39 riding freely within the gear teeth 27 and other times imparting direct rotation thereto due. to a fixed gripping action and the rotation of the rotor casing at the saine speed as the shaft 17 or when the transmission -is in high.

In order to provide -a means for locking or braking the rotor casing 28 and thus cause reverse motion to be transmitted to the shaft 21, a brake band 40 surrounds the .brake di um 29 and is operated by means of the boit or operating member 41 which is similar to the construction used in the band transmission of a well known motor car. The spring 41 normally holds the band loose nhiie the rotation of the bolt 41 ivill cause the band to be contracted and grip the brake surface 29 and thus lock the rotor casing against rota- 37 and 37 will be caused to rotate and imy ,"part reverse rotation through the gear 27 to` the shaft 21. l

. The rotor casing is provided in the present two outlet ports 43 and 43 both of which lead into the chamber-45 of the casing-44 which seals one end of the rotor casing and is rotatable therewith. The annular portion instance with two inlet ports 42 and 42 and 46 of the head 30 of the rotor casing adjacent the'vchamber 45 is provided with an annular. slot 47 having the oil introduction ports 48,

while mounted upon the shaft and forming a portion of the chamber 45 isa sleeve 49 which provides with the head 44 thefanniilar opening 50 the purpose of which will presently appear.

. As shown in Fig. 4, the ports are in communication respectively with the returns 42a and 42h, while the ports 43and 43A are in communication with the returns 43a and 43". By this arrangement, the oil is transferred to and from the rear side of the rotor` teeth, and permits the clutch to idle freelygpreventing noise of oil squeezing from between the teeth toward one end only.

Upon the inner center portionof the head 16 of the main casing there is formed a projection 51 having the .annulus 52 integral therewith, the outer face of which alines with the outer edge of the member 49 and provides a guiding means for the rotatably mounted and slidable sleeve valve 54 which as shown normally projects through Vthe anf nular opening 50 with its inner reduced end 53 workable inthe annular slot 47 and form ing a cut-olf within thechamber 45 and also into the annular space 65as will presently lappear. Thisvalve 54 is provided with the recess forming rings 55 at one end thereof to 42 and 42" receive the pin roller 56 of the yoke 57 which yoke is operable with the shaft 58 exteriorly of the main casing and so as to cause the sleeve valve to be slid longitudinally of the main casing'to regulate the amount of inlet and exhaust of the liquid usedin the present transinission.- Y l rlhe valve 54 as clearly shown in Fi gs. 1 and i 6 is; provided -with a plurality of inclined ports 59 having the enlarged circumferential groove openings 60 and 61 at thel respective ends thereof and which openings are of such a size as to 'permit of the gradual flow of thev liquid from the' chamber 65 into the outer portion of the ychamber 45 and into the respective inlets 42 and 42 and to also permit the outlet of said liquid through the ports 43 and the 'drivenl' shaft 21'; lVVhenthe valve 51- is in its innermost positionthe liquid' is sealed or held within the rotor chamber and as the sarie is non-compressible the rotor casing will v'be rotated at substantially the same speed' as the driving shaft .17 and' in consequence thedrivenshaft 21 will be directlyK connected to.

the drive shaft 17. The' manipulation of the valve 54 to regulate the inlet and outlet flow of theliquid will produce a' differential driving action'to the shaft '17, the rotor casing and the driven shaft as will be fully understood.

The valve 54 is a'balanced valve, thereby-v permitting the easy sliding'of the same to regulate various speed'transmissions even with a maximum pressure of 150 lbs. to the square inch vequalized thereon. 'l

Inorder that liquid which is contained nor- I mally within the sump 69 sealed by theplug.-

.7() ofthe main casing may be properly delivered to the rotor and the rotor will have a free exhaust of the liquid therefrom, the periphery of the rotor casing is dipped into the lliquid within the sump and by centrifugal action causes the liquid to be spread upon the inner walls of the main casing from whence it drains or falls by gravity into .the scuppers l or troughs 68 which -lead the same into screened supply tank 66 which is provided with the outlet plug 67. The tank 66 is in the `natureof a settling basin for the liquid in which the liquid is retained sufficiently long to permit anyair to escape from the liquid, as

the presence of air inthe internal liquid 'or oil system willresult in useless work andl would directly affect the slip, which must be avoided. This tank also lallows some of the dirt and particularly the refuse from the reverse band 40 to settle-out of the liquid, while the screen collects the larger particles.l The suction pipe 62 which is formed integral with the head 16 provides a channel 63 the inlet of vwhich is in the supply tank 66 and the outlet vof which is through the annular space of the i member 51 whichl leads to the annular space 65 before described. By this means the'rotation of the rotor casing will cause the liquid vto be delivered to the tank 66 fromwhence it is drawn by the action of the rotors 33,- 34 and 34 into lthe chamberI and expelled therethrough as before described. Thus it 'will be seen that the liquid will have a free exhaust# into the upper portion of the annular chamber 65 and will'be-drawn from said'chamber into the inlet ports 42 and 424', the valve 54 being so constructed and arranged as to regulate theYow-a-nd, therefore, thetransmission effeet between the driving shaft 17 andthe driven shaft 21. As shown in Fig. 7 the lshaft 35a and, in fact, anydesired shafts ofthe `present construction is provided with the Hyatt roller bearings 71 which reduce the friction and maintain the desired tension between the'rotor actuating shafts.

AIn Fig. 8 the disk v25l is provided with a recessed rim'26 for the reception of the .steel gear 27 which is forced by pressure into the `same to' fit tightly, while in 9l the disk bearing B and the main drive shaft 75 which is provided'with the coupling 76 v for attaching the same to the prime move-r'. Upon the inner face of the head 73 isprovided an annular member 75 which provides a receptacle for the liquid for supplying the same to the rotor,` as will presently appear. The opposite end ofthe drive shaft 75 is mounted in the annular'member 77 of the'disk 78`,l which disk, as in the previously described construction, is provided with an internal gear 79 by means of which the driven shaft 80 is rotated, said shaft being mounted in the lmain casing upon theball bearing 82. The key 83 connects the main rotor member 84which is simi- 'lar tothe rotor construction heretofore describechand this rotor cooperates with the oppositely disposed rotors85 and 85 which, in turn, are carried by the respective shafts 86 and 86 journalled intherotor'casing 87 y which is sealed by means of the removable head 88'.

This casing is provided with the brake drum 89 to receive theI brake band 90 which is operated through the lugs 91 and the rod 92 similar to the band 40 heretofore described to provide the necessary reverse rotation from the shaft 75 to the shaft 80 while con- .nected to the shaft 86 and 86 are the gears 94 and 94' which receive motion from the main gear 93 keyed upon the shaft 75. The gears 95 and 95 are keyed tothe respective shafts 86 and 86 and mesh at diametrically opposite Ypoints with the internal gear 79 and thus form the transmitting means between the rotor casing and the shaft 80. The scup- Ipers 96 are carried upon the internal Walls of the main casing 72 andare adapted to receive the liquid thrown against the walls of the rotor. casing and direct the same as clearly illustrated in Fig. 12 into the annular chamber 7 5 from whence the liquid is fed through the 'channel or open tube 97 into the chamber 99 formedin thefhead88 of the rotor casing. The oppositely disposed lips 100 project below the liquid level within the chamber' 99 so that the liquid will be properly drawn by the action of the rotors through the respective inlet ports 101 and 10,1 and teiminatesin the projection 104 and out of through the respective outlets 102 and 102 vinto the external annular chamber 103 which the exhaust outlets 105 and thereby into the annular chamber 7 5. Y

In order to Control the amount of exhaust. or outlet through the ports 105, the valve 106 is provided, this valve being ofthe cylindrical' type and mounted for rotation with the rotor but having a longitudinal sliding movement upon the'member 104, it being provided with the flanges 107 which provide a space lfor the reception of the rollei` pin 108 of the operating yoke 109, said yoke being rockable througl Uhe shaft 11,0 to impart the necessary longitudinal movement to the valve 106, The valve 106 as illustrated is provided with the inclined edge 111 adjacent the outer end thereof and which is adapted to form a means for directing the flow of the liquidlfrom the ports 105 into the .annular chamberf? 5 and to act as a gradual cut-off or a gradual redriven shaft.

leasing mefansA for the flow of the liquid to provide the necessary and desired gradual transmission effect between the drive shaft 75 and the driven shaft 80.

In this constructionthe valve operates entirely as exhaust means whereas in the construction previously described the valve con-- trols both` the inlet and thelexliaust of the liquid. y

From the foregoing description taken in `connection with the drawings it is evident l must be a gear reduction for low speed,A

and the best possible reduction is at least a 24 to 1, or 3 to 1. Therefore, there would be, for. instance, forty-threeteeth to the gear 37 andfifteen teeth for each pilot gear 39-39. In practice', this .might even be 4 to 1 or forty-three teeth to 4eleven teeth. The iinportance of this gear mounting and vreduction cannot be too greatly stressed, as practicallypall hydraulic clutches as previously designed were merely slipping clutches that did not increase the torque ofthe engines and, therefore, had no advantage over the present type of slip clutch.

Y By making the gear 27 an internal gear, a quiet gear drive is obtainable,

claim as my invention 1. A hydraulic clutch transmission, including a main easing, a driving and a driven shaftjournalled therein, a rotor casing connected to and rotatable with or independentvided with inlet and outlet ports adjacent the Vcenter portion thereof, means carried by the main casing and cooperating with the rotor casing to supply liquid to the rotor casing and the rotors and means for controlling the ow of liquid through the rotor casing to regulate the transmisison effect from the driving to the driven shaft.

2. A hydraulic clutch transmission, including-.a main easing, a driving anda driven shaft journalled therein, a rotor casing connected to and rotatable with or independently of the driving shaft, a main rotor connected to the driving-shaft, a plurality of lcoacting rotors mounted in the casing, planetary `gearing connecting the rotors tozdrive the driven shaft, said rotor casing being provided with inlet and outlet ports adjacent the center portion thereof, means carried by the main casing and cooperating wth the rotor casing to supply liquid to the rczor casing and the rotors and a cylindricfi@ means forming a valve` interposed betr-een the liquid supply and the inlet and ot let ports of the rotor casing to control the' speed of flow and consequently the transmiS-sionelfect from the driving to the driven sh ft.

3. A hydraulic" clutch transmis' ".on, including a main casing, a driving apd a driven shaft journalled therein, a rotor casing connected to and rotatable with or independently of the driving shaft, a mainrotor-con nected'v to the driving'shaft, a plurality of coacting rotors mounted in the casing, planetary gearing connecting therotors to drive the driven shaft, said rotor casing being provided with inlet and outlet ports adjacent the center .portion thereof, means carried by the main casing and cooperating with the rotor casing to supply lliquid to the rotor casing and the rotors, a cylindrical valve revoluble with the rotor casing and interposed between the ports vthereof and the supply, and manually operable means for sliding said valve to regulate the flow of the liquid to and through`- the rotor casing and to regulate the transmission effect between'the driving and driven shafts. y 4. A hydraulic clutch' transmission, including a main casing, a driving and a driven shaft journalled therein, a rotor casing connected to and rotatable with or independently of the driving shaft, a main rotor connected tothe driving shaft, a plurality of co- .acting rotors mounted in the casing, planetary gearing connecting the rotors to drive the vdriven shaft, said rotor casing being pro,- vided withinlet and outlet ports adjacent the center portion thereof, said main casing being provided with a liquid sump, scuppers carried by the' main casing to receive the" liquid from the walls of the casing and to direct the same to the inlet port of the rotor casing.and means yfor controlling the iiow of fluid through the rotor to regulate the translmission effect from the driving to the driven 5. A hydraulic clutch transmission, including a main casing, a driving and a driven shaft journalled therein, a rotor casing connected to and lrotatable with or independently of the driving-shaft, a main rotor connected to vthe driving shaft, a plurality of coacting rotors mounted in the casing, planetary gearing connecting the rotors to drive the driven shaft, said-rotor casing being provided with inlet and outlet ports adjacent` f thecenter portion thereof, kand said main casing being provided with a liquid sump, scuppers carried by the'main casing to receive the liquids from the walls thrown there by the centrifugal actionof the rotor casing and for delivering the liquid tothe inlet port of the rotor casing, and a cylindrical means forming: a valve interposed between the liquid supply and the inlet port to control the speed [of yiow.; and consequently the transmission eifectfromlthe driving to the driven shaft.

i0' shaft journalled therein, a rotor caslng con- 6. A hydraulic clutch transmission, includinga main casing, a driving and a driven nected to and rotatable with or independent-- ly-of the driving shaft, a main rotor con-` nected to the driving shaft, aA pluralityvof coacting rotors mounted in the casing, plane-` tary gearing connecting the rotors to drive the drivenshaft, said rotor casing being provided with inlet and outlet ports adjacent lthe center yportion thereof, said main casing being provided' with a liquid sump, scuppers carried by the main casing to receive the liquid from the walls of the casing deposited thereon by the centrifugal action of the rotor casing and for delivering the liquid to the inlet port of the motor casing, a cylindrical valve rotatable with the rotor casing and interposed between the ports 'thereof and the supply, and manually operablev means for sliding the valve to regulate'the flow of liquid to and through the rotor casing and to regulate the transmission el'ect'between the driving and driven shafts.

7 A hydraulic clutch transmission, including a main casihg,a driving and ,a driven shaft journalled therein, va rotor casing hav- 4 ing inlet and outlet ports, a main rotor connected to the driving shaft and `mounted in s said casing, two (zo-acting rotors mounted'in co 'acting relation to thel main rotor. in said rotor casing, gearing between the driving s haftand both co-acting rotors whereby thel rotors are operated simultaneously, cooperating driving means-.between the co-acting rotors and the driven shaft, and means for controlling the flow of liquid through the rotor casing, whereby the speed at which the rotor casing is rotated with the drivingshaft is regulated and the speedof the driven shaft is regulated. f

` 8, A hydraulic clutch transmission, including a'inain casing, a driving and a -driven shaft journalled therein, a rotor casing having inlet andoutlet ports, a main rotor connected tothe driving shaft and'mounted in said casing,.two co-acting rotors mounted in co-acting relation to the main rotor in said rotor casing, gearing between the driving shaft and both co-actingrotors whereby the rotors are operated simultaneously, cooperating a main stationary casing having a liquid sump, a driving shaft and a driven shaft journalled in said casing, a rotor casing mount' edwin the main casing and disposed to rotate in the sump to throw vthe liquid therefrom. upon. the walls of the main casing, said rotor casing having inlet and outlet ports, a liquid receiving chamber connected with the ports of the rotor casing and to receive the liquid from the walls of the main casing, a main rotor mounted upon the drive shaft with the rotor casing, two cofacting rotorsmeshing with the main rotor and mounted in the rotor casing, gearing between the drive shaft and the auxiliary rotors to drive all rotors in timed relation, cooperating connecting means between the cooperating rotors and the driven sh'aft, and manually operable means for controllingand regulating the liquid flow from the receiving chamber to and through the rotor.

10. A hydraulic clutch transmission, in-

cluding a main stationary casing having a,

liquid sump, a driving shaft and a driven shaft journalled in said casing,a'rotor casing having a brake band mounted in the main *casing and disposed to rotate in the sump to throw the liquid therefrom uponthe walls of the main casing, said rotorfjcasing having inlet and outlet ports, a liquid receiving chamber connected with the ports of the rotor casing and to receive the liquid from the walls of the maincasing, armain rotor mounted upon the drive shaft within the. rotor casing, two co-acting rotors meshing with the main rotor y'and mounted in lthe rotor casing, gearing between thedrive shaftand the auxiliary rotors to drive all rotors in timed relatlon, cooperatingl connecting means between the cooperating rotors an'd the driven shaft, manually operable means for controlling and regulating the liquid now from the receiving chamber to and through the rotor, and a brake band for holding the rotor casing stationary while the drive shaftand rotors are being operated and to cause reverse action to be imparted to '.the driven shaft through the drive shaft and rotors.

11. A hydraulic clutch transmission, including a nia-in stationary casing havinga liquid sump, a driving shaft and a driven shaft journalled in said casing, a rotor casing mounted in the main casing and disposed to rotate in the sump to throw the liquid therefrom upon the walls of the main casing, said rotor casing having inlet and outlet ports, a liquid receiving chamber connected with the ports of the rotor casing and vto receive the liquid from the walls of the main casing, a main rotor mounted upon the drive shaft within the rotor casing, two co-acting rotors meshing with the main rotor and mounted in the rotor casing, gearing between the 'drive shaft and tae auxiliary rotors to drive all rotors in timed relation, cooperating connecting means between the cooperating-rotors and the driven shaft, and a slidably mounted cylindrical vave rotatable with the rotor casing and interposed between the receiving chamber and the inlet and outlet ports o the rotor casing to regulate the liquid iiow to and `from the rotors,

12. Av hydraulic clutch transmission, including a main stationary casing having a liquid sump, a driving shaft and a driven shaft jour-nailed in said casing, a rotor casing having a brake band mounted in the main casing and disposed to rotate in the sump to throw the liquid therefrom upon the walls of the main casing, said rotor casing having inlet and out-let ports, a liquid receiving chamber connected with the ports of the rotor casing and to receive the liquid from the walls of the main casing, a main rotor mount ed upon the drive shaft vithin the rotor casing, two coacting rotors meshing with the main rotor and mounted in the rotor casing, gearing between the drive shaft and the auxiliary rotors to drive all rotors in timed relation, cooperating connecting means between the cooperating rotors and the driven shaft, a slidably mounted cylindrical valve rotatable with' the rotor casing and interposed between the receiving chamber and the inlet and outlet ports of 'the rotor casing to regulate the liquid iiow to and from the rotors, and a brake band for holding the'rotor casing 'stationary while the drive shaft and rotors are being operated and to cause reverse rotation to be imparted through the drive shaft tothe driven shaft by the rotors.

18` A. hydraulic clutch transmissiom including'a main stationary casing having a liquid sumpi a driving shai-t and a. driven shaft journal-led i casing rotor casing mounted inthe main casing and disposed to rotate in the sump to throw the liquid therefrom'upon the walls of the main caslng, said ,rotor casing having inlet and outlet ports, a.

liquid receiving chamber connected with the ports of the rotor casing and to receive the liquid from the walls of the main casing, a main rotor mounted upon the 'drive shaft within the rotor casing, two co-acting rotors meshing with the main rotor and mounted in the rotor casing, gearing between the drive shaft and the auxiliary rotors to drive all rotors in timed relation, cooperating connecting means between the cooperating rotors and the driven shaft, a slidably mounted cylindrical valve rotatable with the rotor casing and interposed between the receiving chamber and the inlet and outlet ports ofthe rotor casing to regulate the liquid flow to and from the rotors,.jand manually operable means for sliding the valve. A

11i. A hydraulic clutch transmission, including a main stationary casing having a liquid sump, a driving shaft and a driven shaft journalled .in said casing, a rotor casing having a brake bandvmounted in the main casing and disposed to rotate in the sump to throw the liquid therefrom upon the walls of the main basing, said rotor casing having inlet and outlet ports, a liquid receiving chamber connected with the ports of the rotor casing and to receive the liquid from the walls of the main casing, a main rotor-'mounted upon .the drive shaft within the rotor casing,

two co-acting rotors meshing with the main 00 rotor and mounted in the rotor casing, gear ing between the drive shaft and the auxiliary rotors to drive all rotors in timed relation, cooperating connectin' means between the cooperating rotors and the driven shaft, a slidably mounted cylindrical valve rotatable with the rotor casing' and interposed between the receiving chamber and the inlet and outlet of the rotor casing to regulate the liquid iiow to and from vthe rotors, manually operable means for sli-ding the valve, and a brake band for holding the rotor casing stationary while the' drive shaft and rotors are being operated and to cause reverse rotation to be imparted to the driven shaft through the drive shaft and rotors.

15. A hydraulic 'clutch transmission, including a main stationax casing having a liquid sump, a driving s aft and a. driven shaft journaled in said casing, a rotor casing mounted in the inain casing and disposed to rotate in the sump to throw the liquid therefrom upon the walls of the main casing, said the rotor casing, gearing between the drive shaft and the auxiliary rotors to drive all the liquid tlow to and from'the rotors.

In testimony whereof I have hereunto set my hand.

HARMON J. KLINE. 

